GB1393934A - Diamond particle particularly for use in heat sinks - Google Patents

Diamond particle particularly for use in heat sinks

Info

Publication number
GB1393934A
GB1393934A GB3397372A GB3397372A GB1393934A GB 1393934 A GB1393934 A GB 1393934A GB 3397372 A GB3397372 A GB 3397372A GB 3397372 A GB3397372 A GB 3397372A GB 1393934 A GB1393934 A GB 1393934A
Authority
GB
United Kingdom
Prior art keywords
particles
diamond
planar surface
heat sinks
truncated
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB3397372A
Inventor
Joseph Lambert Maria Custers
Frederick Anton Raal
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
De Beers Industrial Diamond Division Pty Ltd
Original Assignee
De Beers Industrial Diamond Division Pty Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from ZA715111A external-priority patent/ZA715111B/en
Application filed by De Beers Industrial Diamond Division Pty Ltd filed Critical De Beers Industrial Diamond Division Pty Ltd
Publication of GB1393934A publication Critical patent/GB1393934A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
    • F28F21/02—Constructions of heat-exchange apparatus characterised by the selection of particular materials of carbon, e.g. graphite
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L23/00—Details of semiconductor or other solid state devices
    • H01L23/34—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements
    • H01L23/36—Selection of materials, or shaping, to facilitate cooling or heating, e.g. heatsinks
    • H01L23/373—Cooling facilitated by selection of materials for the device or materials for thermal expansion adaptation, e.g. carbon
    • H01L23/3732—Diamonds
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
    • H01L2924/0001—Technical content checked by a classifier
    • H01L2924/0002—Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Materials Engineering (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
  • Carbon And Carbon Compounds (AREA)

Abstract

1393934 Gems DE BEERS INDUSTRIAL DIAMOND DIVISION Ltd 20 July 1972 [30 July 1971 24 Aug 1971 19 Nov 1971] 33973/ 72 Heading A3H [Also in Divisions Cl and H1] A spheroidal, i.e. shaped as close to the spherical as possible, diamond particle is truncated by a planar surface. Preferably the diamond is truncated by a pair of parallel planar surfaces. The particles may be produced using conventional techniques e.g. rounding in a fluid energy mill until the desired spheroidal particles are obtained, mounting a mono-layer of such particles in a bronze matrix, utilising a polishing scarfe to grind on the desired planar surface and then removing the matrix to obtain the particles. A second planar surface (Fig. 2 not shown) may be ground on the particles by a similar method if so desired. The particles which may be Type IIa diamonds of a size of 0.25 to 2.5 mms can be utilised as heat sinks. The planar surfaces may be polished after grinding e.g. by heating at 500 to 800‹C with potassium nitrate for about 2 hours. This improves their thermal conductivity and smooths out any surface imperfections.
GB3397372A 1971-07-30 1972-07-20 Diamond particle particularly for use in heat sinks Expired GB1393934A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
ZA715111A ZA715111B (en) 1971-07-30 1971-07-30 A novel diamond particle particularly for use in heat sinks
ZA715666 1971-08-24
ZA717816 1971-11-19

Publications (1)

Publication Number Publication Date
GB1393934A true GB1393934A (en) 1975-05-14

Family

ID=27420848

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3397372A Expired GB1393934A (en) 1971-07-30 1972-07-20 Diamond particle particularly for use in heat sinks

Country Status (15)

Country Link
US (1) US3828848A (en)
JP (1) JPS5215438B2 (en)
AU (1) AU466719B2 (en)
BE (1) BE786812A (en)
CA (1) CA978282A (en)
CH (1) CH544524A (en)
DE (1) DE2236011A1 (en)
DK (1) DK140647B (en)
FR (1) FR2148087B1 (en)
GB (1) GB1393934A (en)
IE (1) IE36616B1 (en)
IL (1) IL39936A (en)
IT (1) IT969524B (en)
NL (1) NL160434C (en)
SE (1) SE374007B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2144622A (en) * 1983-08-03 1985-03-13 Giovanni Colliva Gemstones and apparatus for their lapidation
GB2149207A (en) * 1983-10-26 1985-06-05 Plessey Co Plc Improvements in or relating to diamond heatsink assemblies
US4686795A (en) * 1982-09-16 1987-08-18 Giovanni Colliva Principles and appliances for cutting of spherical-faceted gems and gems thus obtained
GB2227402A (en) * 1989-01-26 1990-08-01 M Vainer Limited Diamond gemstones

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5642779A (en) * 1909-06-30 1997-07-01 Sumitomo Electric Industries, Ltd. Heat sink and a process for the production of the same
JPS54107266A (en) * 1978-02-10 1979-08-22 Nec Corp High-output semiconductor element
JPS5617128A (en) * 1979-07-23 1981-02-18 Banyou Kogyo Kk Drawing apparatus for pipe
GB8325320D0 (en) * 1983-09-21 1983-10-26 Plessey Co Plc Diamond heatsink assemblies
GB8326983D0 (en) * 1983-10-08 1983-11-09 Plessey Co Plc Diamond heatsink assemblies
US4649992A (en) * 1984-10-05 1987-03-17 Plessey Overseas Limited Diamond heatsink assemblies
GB8607526D0 (en) * 1986-03-26 1986-04-30 Artus R G C Cooled component assembly
US4782893A (en) * 1986-09-15 1988-11-08 Trique Concepts, Inc. Electrically insulating thermally conductive pad for mounting electronic components
US5455738A (en) * 1993-07-28 1995-10-03 E-Systems, Inc. High thermal conductivity, matched CTE. low density mounting plate for a semiconductor circuit
US5566752A (en) * 1994-10-20 1996-10-22 Lockheed Fort Worth Company High heat density transfer device
US20060113546A1 (en) * 2002-10-11 2006-06-01 Chien-Min Sung Diamond composite heat spreaders having low thermal mismatch stress and associated methods
US7173334B2 (en) * 2002-10-11 2007-02-06 Chien-Min Sung Diamond composite heat spreader and associated methods
US20050189647A1 (en) * 2002-10-11 2005-09-01 Chien-Min Sung Carbonaceous composite heat spreader and associated methods
AU2003284065A1 (en) * 2002-10-11 2005-05-05 Chien-Min Sung Carbonaceous heat spreader and associated methods
US7791188B2 (en) * 2007-06-18 2010-09-07 Chien-Min Sung Heat spreader having single layer of diamond particles and associated methods
US9006086B2 (en) 2010-09-21 2015-04-14 Chien-Min Sung Stress regulated semiconductor devices and associated methods
US8778784B2 (en) 2010-09-21 2014-07-15 Ritedia Corporation Stress regulated semiconductor devices and associated methods
TWI464839B (en) 2010-09-21 2014-12-11 Ritedia Corp Diamond particle mololayer heat spreaders and associated methods

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4686795A (en) * 1982-09-16 1987-08-18 Giovanni Colliva Principles and appliances for cutting of spherical-faceted gems and gems thus obtained
GB2144622A (en) * 1983-08-03 1985-03-13 Giovanni Colliva Gemstones and apparatus for their lapidation
GB2149207A (en) * 1983-10-26 1985-06-05 Plessey Co Plc Improvements in or relating to diamond heatsink assemblies
US4582954A (en) * 1983-10-26 1986-04-15 Plessey Overseas Limited Diamond heatsink assemblies
GB2227402A (en) * 1989-01-26 1990-08-01 M Vainer Limited Diamond gemstones
GB2227402B (en) * 1989-01-26 1992-02-19 M Vainer Limited Improvements in or relating to gemstones

Also Published As

Publication number Publication date
NL160434C (en) 1979-10-15
CA978282A (en) 1975-11-18
IE36616L (en) 1973-01-30
JPS4831875A (en) 1973-04-26
JPS5215438B2 (en) 1977-04-28
NL160434B (en) 1979-05-15
DK140647C (en) 1980-03-10
SE374007B (en) 1975-02-17
IL39936A0 (en) 1972-09-28
US3828848A (en) 1974-08-13
BE786812A (en) 1972-11-16
IT969524B (en) 1974-04-10
DK140647B (en) 1979-10-15
IE36616B1 (en) 1977-01-19
FR2148087A1 (en) 1973-03-11
DE2236011A1 (en) 1973-02-08
FR2148087B1 (en) 1977-04-01
AU4473272A (en) 1974-01-24
AU466719B2 (en) 1975-11-06
CH544524A (en) 1973-11-30
IL39936A (en) 1975-04-25
NL7210348A (en) 1973-02-01

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee